package com.yhk.wuchat.common.user.controller;


import com.yhk.wuchat.common.user.service.WXMsgService;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.bean.WxOAuth2UserInfo;
import me.chanjar.weixin.common.bean.oauth2.WxOAuth2AccessToken;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpMessageRouter;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
import me.chanjar.weixin.mp.bean.message.WxMpXmlOutMessage;
import me.chanjar.weixin.mp.bean.result.WxMpQrCodeTicket;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.view.RedirectView;

import javax.annotation.Resource;

/**
 * Description: 微信api交互接口
 */
@Slf4j
@AllArgsConstructor
@RestController
@RequestMapping("/wx/portal/public")
public class WxPortalController {

    @Resource
    private final WxMpService wxService;
    private final WxMpMessageRouter messageRouter;
    @Resource
    private WXMsgService wxMsgService;

    @GetMapping("/test")
    public String getQrCode() throws WxErrorException {
        WxMpQrCodeTicket wxMpQrCodeTicket = wxService.getQrcodeService().qrCodeCreateTmpTicket(1, 1000);
        String url=wxMpQrCodeTicket.getUrl();
        System.out.println(url);
        return url;
    }

    /**
     * 微信认证服务器
     * @param signature
     * @param timestamp
     * @param nonce
     * @param echostr
     * @return
     */
    @GetMapping(produces = "text/plain;charset=utf-8")
    public String authGet(@RequestParam(name = "signature", required = false) String signature,
                          @RequestParam(name = "timestamp", required = false) String timestamp,
                          @RequestParam(name = "nonce", required = false) String nonce,
                          @RequestParam(name = "echostr", required = false) String echostr) {

        log.info("\n接收到来自微信服务器的认证消息：[{}, {}, {}, {}]", signature,
                 timestamp, nonce, echostr);
        if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
            throw new IllegalArgumentException("请求参数非法，请核实!");
        }
        if (wxService.checkSignature(timestamp, nonce, signature)) {
            return echostr;
        }
        return "非法请求";
    }

    /**
     * 用户授权的回调函数
     * @param code
     * @return
     * @throws WxErrorException
     */
    @GetMapping("/callBack")
    public RedirectView callBack(@RequestParam String code) throws WxErrorException {
        log.info("回调函数开始执行");
        WxOAuth2AccessToken accessToken = wxService.getOAuth2Service().getAccessToken(code);
        //根据accessToken获取用户信息
        WxOAuth2UserInfo userInfo = wxService.getOAuth2Service().getUserInfo(accessToken, "zh_CN");
        wxMsgService.authorize(userInfo);
        RedirectView redirectView = new RedirectView();
        redirectView.setUrl("https://moresuo.top");
        return  redirectView;
    }

    /**
     * 接收和处理微信服务器的消息
     * @param requestBody
     * @param signature
     * @param timestamp
     * @param nonce
     * @param openid
     * @param encType
     * @param msgSignature
     * @return
     */
    @PostMapping(produces = "application/xml; charset=UTF-8")
    public String post(@RequestBody String requestBody,
                       @RequestParam("signature") String signature,
                       @RequestParam("timestamp") String timestamp,
                       @RequestParam("nonce") String nonce,
                       @RequestParam("openid") String openid,
                       @RequestParam(name = "encrypt_type", required = false) String encType,
                       @RequestParam(name = "msg_signature", required = false) String msgSignature){
        log.info("\n接收微信请求：[openid=[{}], [signature=[{}], encType=[{}], msgSignature=[{}],"
        + " timestamp=[{}], nonce=[{}], requestBody=[\n{}\n] ",
        openid, signature, encType, msgSignature, timestamp, nonce, requestBody);

         if (!wxService.checkSignature(timestamp, nonce, signature)) {
            throw new IllegalArgumentException("非法请求，可能属于伪造的请求！");
         }

         String out = null;
         if (encType == null) {
             // 明文传输的消息
             WxMpXmlMessage inMessage = WxMpXmlMessage.fromXml(requestBody);
             WxMpXmlOutMessage outMessage = this.route(inMessage);
             if (outMessage == null) {
                return "";
             }

             out = outMessage.toXml();
         } else if ("aes".equalsIgnoreCase(encType)) {
             // aes加密的消息
             WxMpXmlMessage inMessage = WxMpXmlMessage.fromEncryptedXml(requestBody, wxService.getWxMpConfigStorage(),
             timestamp, nonce, msgSignature);
             log.debug("\n消息解密后内容为：\n{} ", inMessage.toString());
             WxMpXmlOutMessage outMessage = this.route(inMessage);
             if (outMessage == null) {
                return "";
             }
             out = outMessage.toEncryptedXml(wxService.getWxMpConfigStorage());
         }
            log.debug("\n组装回复信息：{}", out);
            return out;
    }
    private WxMpXmlOutMessage route(WxMpXmlMessage message) {
         try {
            return this.messageRouter.route(message);
         } catch (Exception e) {
            log.error("路由消息时出现异常！", e);
         }
         return null;
    }
}
